IMX95CEC datasheet(57/113 Pages) NXP

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Table 57. Ethernet management interface AC Timing specifications...continued

Symbol

Description

Min

Typ

Max

Unit

Condition

tMGCL

MDC clock pulse width low

—

tMDKHDX

MDC to MDIO output delay 2,3,4 Y x

tenet_clk

- 3

—

Y x

tenet_clk

+ 3

—

NEG=0

tMDKHDX

MDC to MDIO output delay 2,3,4 Y

-tenet_clk

—

Y +

tenet_clk

—

NEG=1

tMDDVKH

MDIO to MDC input setup time 5 8

—

tMDDXKH

MDIO to MDC input hold time

—

tRGTR

Rise time (20%-80%)

—

TBD

—

tRGTF

Fall time (20%-80%)

—

TBD

—

1. This parameter is dependent on the Ethernet clock frequency. The MDIO_CFG [MDIO_CLK_DIV] field determines the

MDC clock frequency.

2. For NEG=0: Y = ( 1+(2+6*EHOLD)*MDIO_HOLD ) For NEG=1: Y=MDIO_CLK_DIV even: MDC clk / 2 Y=MDIO_CLK_DIV

odd: (MDC clk / 2) +/- tENET_CLK

3. tENET_CLK = 333 Mhz max. How to program ???

4. MDIO timing is configurable by programming the EMDIO_CFG register fields. The default value of Y = 5. Y is the

value determined by EMDIO_CFG[NEG], EMDIO_CFG[MDIO_HOLD], and MDIO[EHOLD]. The easiest way is to program

NEG=1, then MDIO is driven at negative edge of MDC, satisfying both setup and hold time requirement of Ethernet PHY.

5. The setup time tMDDVKH is measured at a) 470pf load @ 1.8V in open-drain mode b) 300pf load @ 1.8V in push-pull

mode

MDC

MDIO

(input)

MDIO

(output)

tMDC

tMDCH

tMDDVKH

tMDDXKH

tMDKHDX

Figure 23. Ethernet management interface timing diagram

4.11.2.1.2 Ethernet management interface DC electrical characteristics at voltage rail =1.8V

This table provides the EMI DC electrical characteristics

Table 58. Ethernet management interface DC electrical characteristics at voltage rail =1.8V

Symbol

Description

Min

Typ

Max

Unit

Condition

VIH

Input high voltage

0.7 x

SUPPLY

—

Table continues on the next page...

NXP Semiconductors

IMX95CEC

i.MX 95 Applications Processors Data Sheet for Commercial Products

IMX95CEC

All information provided in this document is subject to legal disclaimers.

Preliminary Data Sheet

Rev. 2 — 11 November 2024

Preliminary - Subject to Change Without Notice

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